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What is the maximum phase shift that can occur in an op-amp with single capacitor?

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in Linear Integrated Circuits by (41.4k points)
What is the maximum phase shift that can occur in an op-amp with single capacitor?

(a) 180^o

(b) 60^o

(c) 270^o

(d) 90^o

I have been asked this question during an online exam.

I need to ask this question from Open-Loop Voltage Gain as a Function of Frequency topic in portion Practical Limitations of Op Amp Circuits of Linear Integrated Circuits

1 Answer

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by (13.9k points)
The maximum phase shift that can occur in an op-amp with a single capacitor is 90 degrees.

This occurs at the break frequency (corner frequency) where the capacitive reactance equals the resistance. At this frequency, the phase shift is maximum at 90 degrees in an RC circuit.

Answer: (d) 90°

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